Answer:
A catalyst is a substance that can be added to a reaction to increase the reaction rate without getting consumed in the process. ... Enzymes are proteins that act as catalysts in biochemical reactions. Common types of catalysts include enzymes, acid-base catalysts, and heterogeneous (or surface) catalysts.
b . transition metal
c . inner transition metal
d . lanthanides-series element
Answer:
A - actinide-series element
Explanation:
If you go to the periodic table, the atomic number is 92. if you look for 92 you will end up in the inner transition metals then if you get more detail it would be in the actinide section.
The most specific classification for the element uranium is option a, it is an actinide series element. It is a radioactive element.
Uranium is 92nd element in periodic table. This is a f- block element. In periodic table the elements of groups 3-12 is called transition metals. Elements in f block is called inner transition elements.
The inner transition elements contain two classification, lanthanides and actinides. 57th to 71th elements are called lanthanides. 89 to 103 are called actinides.
Thus, uranium belongs to the actinide series of f block elements in the periodic table therefore, option a is correct.
To learn more about actinides, refer the link below:
#SPJ2
Answer:
the more heat the more particle movement i dont think mass has any thing to do with it
Explanation:
57.13% is the mass percent of oxygen in sodium bicarbonate. Mass percentage, also known as weight percentage or mass percent.
Mass percentage, also known as weight percentage, is a way of expressing the concentration of a component in a mixture or a compound. It represents the mass of the component (usually expressed in grams) per 100 grams of the mixture or compound. Mass percentage is commonly used in chemistry and other scientific fields to quantify the amount of a particular substance relative to the total mass of the mixture.
Na = 22.99 g/mol
H = 1.00 g/mol
C = 12.01 g/mol
O = 15.99 g/mol
Molar Mass of solution = (22.99 g/mol) + (1.00 g/mol) + (12.01 g/mol) + (15.99 g/mol x 3)
= 83.97 g/mol
(47.97 g/mol) / (83.97 g/mol) x 100 = 57.13%
To know more about mass percent, here:
#SPJ3
Answer:
Molar mass of NaHCO3 = 84.00661 g/mo
Explanation:
This compound is also known as Baking Soda or Sodium Bicarbonate.
Convert grams NaHCO3 to moles or moles NaHCO3 to grams
Molecular weight calculation:
22.98977 + 1.00794 + 12.0107 + 15.9994*3